Match List-I with List-II.

| List-I (Respiratory Volume) | List-II (Capacity in mL) |
|---|---|
| A. ERV (Expiratory Reserve Volume) | I. 2500–3000 mL |
| B. RV (Residual Volume) | II. 500 mL |
| C. IRV (Inspiratory Reserve Volume) | III. 1000–1100 mL |
| D. TV (Tidal Volume) | IV. 1100–1200 mL |

Choose the correct answer from the options given below:

Question

Match List-I with List-II.

| List-I (Respiratory Volume) | List-II (Capacity in mL) |
|---|---|
| A. ERV (Expiratory Reserve Volume) | I. 2500–3000 mL |
| B. RV (Residual Volume) | II. 500 mL |
| C. IRV (Inspiratory Reserve Volume) | III. 1000–1100 mL |
| D. TV (Tidal Volume) | IV. 1100–1200 mL |

Choose the correct answer from the options given below:

Accepted Answer

A. 1. **Recall the definition of each respiratory volume.** Respiratory volumes are the different amounts of air involved during normal and forced breathing, and each has a typical value in an adult human.

2. **Tidal Volume (TV).** This is the volume of air breathed in or out during **normal quiet breathing**.
$$
TV \approx 500 \; 	ext{mL}
$$
So, **D matches II**.

3. **Expiratory Reserve Volume (ERV).** This is the **extra air** that can be forcefully expired after a normal tidal expiration.
$$
ERV \approx 1000	ext{–}1100 \; 	ext{mL}
$$
So, **A matches III**.

4. **Residual Volume (RV).** This is the air that **always remains** in the lungs even after the most forceful expiration, so the lungs never fully collapse.
$$
RV \approx 1100	ext{–}1200 \; 	ext{mL}
$$
So, **B matches IV**.

5. **Inspiratory Reserve Volume (IRV).** This is the **extra air** that can be forcefully inspired after a normal tidal inspiration, and it is the largest of the four volumes.
$$
IRV \approx 2500	ext{–}3000 \; 	ext{mL}
$$
So, **C matches I**.

6. **Conclusion.** Combining all matches:
$$
A	ext{-III}, \; B	ext{-IV}, \; C	ext{-I}, \; D	ext{-II}
$$

Hence, the answer is **A**.

List-I (Respiratory Volume)	List-II (Capacity in mL)
A. ERV (Expiratory Reserve Volume)	I. 2500–3000 mL
B. RV (Residual Volume)	II. 500 mL
C. IRV (Inspiratory Reserve Volume)	III. 1000–1100 mL
D. TV (Tidal Volume)	IV. 1100–1200 mL